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INSTALLATION
INSTRUCTIONS
2006 Lennox Industries Inc.
Dallas, Texas, USA
15CHAX SERIES UNITS
PACKAGED ELECTRIC UNIT (2−5 TONS)
505,201M (38152A082)
01/08
Litho U.S.A.
Supersedes 05/06
Shipping & Packing List
1 − Assembled packaged electric unit
As soon as the unit is received, it should be inspected for
possible damage during transit. If you find any damage, im-
mediately contact the last carrier.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause propert
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15CHAX Unit Dimensions − inches (mm) FG 2−1/2 (64) 2−1/2 (64) AA BB Center Of Corner Weights Gravity DOWN−FLOW 2−3/4 Model Model SUPPLY AIR D AA BB CC DD EE FF Number Number (70) OPENING E E lbs. lbs. lbs. lbs. in. in. 15CHAX−24 75 94 117 94 16 29 DOWNFLOW D RETURN AIR C 15CHAX−30 75 94 117 94 16 29 OPENING 15CHAX−36 83 97 121 104 16 30 15XHAX−42 110 138 163 129 21 33 EE FF 15CHAX−48 114 139 164 134 21 33.5 15CHAX−60 119 145 171 140 21 33.5 DD CC TOP VIEW B E HORIZONTAL HORIZONTAL D SUPPLY AIR R
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Parts Arrangement A pre−filter must be installed at the entry to the return air General duct. These installation instructions are intended as a general The return air duct must be provided and sealed to the guide only, for use by an experienced, licensed contractor unit. (or equivalent). Return air temperature range between 55°F (13°C) The 15CHAX units are single−package electric units and 80°F (27°C) must be maintained. designed for outdoor installation on a rooftop or a slab. The A
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For installation on combustible material. Accessory Lift Kit WARNING Product contains fiberglass wool. Lifting Bracket Disturbing the insulation in this product during Accessory installation, maintenance, or repair will expose you Sheet Metal to fiberglass wool dust. Breathing this may cause Screw lung cancer. (Fiberglass wool is known to the State of California to cause cancer.) Fiberglass wool may also cause respiratory, skin, and eye irritation. To reduce exposure to this substance or for
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ate Category 1 Natural Gas and Propane appliances Existing Common Vent Systems venting sizing tables in the current standards of the The 15CHAX packaged cooling units with auxiliary electric CSA B149 Natural Gas and Propane Installation heat may replace an existing furnace which is being re- Codes in Canada.) moved from a venting system commonly run with separate gas appliances. In this case, the existing vent system is Condensate Drain likely to be too large to properly vent the remaining at- T
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Filters Removing Supply and Return Air Opening Covers Filters are not factory−supplied with the unit; however, 2 optional internally installed filter kits are available. Filter kit 92M54 is used with 2, 2−1/2 and 3−ton units. Filter kit 92M55 1 is used with 3−1/2, 4 and 5−ton units. The filter kits accommodate the use of 1", 2" or 4" filters. If the optional filter kit is not used, a filter must be field−installed. 1.Remove screw and lift. Base Filters must always be installed ahead of evaporat
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Unit must be electrically grounded in accordance with local the installation instructions packaged with the electric heat codes or in the absence of local codes with the National section. Electric Code, ANSI/NFPA No. 70 (latest edition) or CSA Thermostat C22.2 Part 1 (latest edition). The room thermostat should be located on an inside wall Power supply to the unit must comply with all applicable where it will not be subject to drafts, sun exposure or heat codes and NEC or CEC. A fused disconnec
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Figure 7 Page 8 15CHAX Series Packaged Electric Units Typical Wiring Diagram
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Read through the jumper settings section before adjusting Blower Control Board (A54) the jumper to obtain the appropriate blower speed. To change jumper positions, gently pull the jumper off the pins and place it on the desired set of pins. The following ! WARNING section outlines the different jumper selections available Electric shock hazard. Can cause injury or and conditions associated with each one. Refer to figure 8. death. Before attempting to perform any After the CFM for each applicatio
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COOL CONTINUOUS FAN The COOL jumper is used to determine the CFM during When the thermostat is set for Continuous Fan" operation cooling operation. This jumper selection is activated for and there is no demand for heating or cooling, the blower cooling when Y1 is energized. control will provide 50 percent of the COOL CFM selected. The blower motor runs at 80 percent of the selected air flow NOTE − With the proper thermostat and subbase, continu- for the first 7−1/2 minutes of each cooling deman
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LSOM LED Functions System Operation Monitor (LSOM) Power LED (green) −− Voltage within the range of The system operation monitor (A132) detects the most 19−28VAC is present at the system monitor power connec- common fault conditions in the air conditioning system. tion. When an abnormal condition is detected, the module com- Alert LED (yellow) −− Communicates an abnormal system municates the specific condition through its ALERT and condition through a unique flash code. The alert LED TRIP lights
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Table 5 System Operation Monitor LED Troubleshooting Codes Status LED Condition Status LED Description Status LED Troubleshooting Information Green Power" LED ON Module has power 24VAC control power is present at the module terminal. Determine/verify that both R and C module terminals are connected Green Power" LED Module not powering up and voltage is present at both terminals. OFF 1. Red Trip" LED ON System and compressor Verify Y terminal is connected to 24VAC at contactor coil. 2. check o
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immediately stop. The circulating air blower continues Unit Start−Up and Operation operating through a 90−second delay. Each 15CHAX packaged cooling unit is factory−charged Unit compressors have internal protection. If there is an with R−410A refrigerant. The compressor is hermetically abnormal rise in the compressor temperature, the sealed, internally sprung and base−mounted with protector will open and the compressor will stop. rubber−insulated hold−down bolts. System Performance Pre−Start Che
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Motors Condenser Fan Clearances Indoor, outdoor fan and vent motors are permanently The top of the condenser fan should be 1−1/2 inches from lubricated and require no further lubrication. Motors should the bottom of the top grille. This dimension should be be cleaned yearly to prevent the accumulation of dust and checked and the fan should be adjusted accordingly any dirt on the windings or motor exterior. time servicing of the outdoor fan system is required. Coil Dirt and debris should not be a
